User guide

206 RealCT Direct API Developer Guide
Chapter 6: MVIP-95
Switching Data
A board with a switch block can transfer data between resources
on any board connected through the CT bus. A board such as the
RTNI series, which only provides line resources, would switch a
call to a Vantage VRS to process the call. Only the RTNI,
RealBLOCs, and Vantage PCI series boards provide switch
blocks. Although Vantage VRS, Vantage VPS, and RDSP/xx000
boards connect to the CT bus, they do not have a switch block
and can only process data switched to their resources by another
board.
Throughout this section, boards connected in a CT bus are
depicted as shown in Figure 41.
Figure 41. A Board in a CT bus
In Figure 41, the arrows above the boards represent streams in
the CT bus. Streams running within the board to and from
internal line or VP resources represent local streams. The
rectangle with an X is the switch block. Arrows connecting
CT bus and local resources through the switch block show which
streams the switch block is switching data between. Numbers
beside the arrows define the stream and timeslot that the
switch block is switching data between.
(1, 8)
(0, 8)
(0, 9)
(1, 9)
Local Stream 0
Local Stream 1
Vantage PCI
CT Bus
Stream 0
Stream 1
DSP1